Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and waste water treatment industries. Historically this was first used in the mining industry, where it was one of the .. By 1991, the average grade of copper ore mined in the US had fallen to only.

Aluminium ore is called bauxite. The bauxite is . The diagram shows an aluminium oxide electrolysis tank. Both the . Consequently, the positive electrodes have to be replaced frequently, which adds to the cost of the process. Now try a Test.